- iniquitous, sinful, ungodly - characterized by iniquity; wicked because it is believed to be a sin; "iniquitous deeds"; "he said it was sinful to wear lipstick"; "ungodly acts"
Antonym: virtuous (indirect, via wicked)
- impious, ungodly - lacking piety and reverence for a god
Antonym: religious (indirect, via irreligious)